fix default hook

packages/kit/src/exports/public.d.ts

@@ -79,11 +79,12 @@ export interface ActionFailure<T extends Record<string, unknown> | undefined = u
 	[uniqueSymbol]: true; // necessary or else UnpackValidationError could wrongly unpack objects with the same shape as ActionFailure
 }
 
-type UnpackValidationError<T> = T extends ActionFailure<infer X>
-	? X
-	: T extends void
-		? undefined // needs to be undefined, because void will corrupt union type
-		: T;
+type UnpackValidationError<T> =
+	T extends ActionFailure<infer X>
+		? X
+		: T extends void
+			? undefined // needs to be undefined, because void will corrupt union type
+			: T;
 
 /**
  * This object is passed to the `adapt` function of adapters.

packages/kit/src/runtime/client/client.js

@@ -968,7 +968,7 @@ async function load_route({ id, invalidating, url, params, route, preload }) {
 			server_data_node: create_data_node(
 				// server_data_node is undefined if it wasn't reloaded from the server;
 				// and if current loader uses server data, we want to reuse previous data.
-				server_data_node === undefined && loader[0] ? { type: 'skip' } : server_data_node ?? null,
+				server_data_node === undefined && loader[0] ? { type: 'skip' } : (server_data_node ?? null),
 				loader[0] ? previous?.server : undefined
 			)
 		});

packages/kit/src/runtime/server/index.js

@@ -69,7 +69,7 @@ export class Server {
 
 				this.#options.hooks = {
 					handle: module.handle || (({ event, resolve }) => resolve(event)),
-					handlePageData: module.handlePageData || (({ pageData, resolve }) => resolve(pageData)),
+					handlePageData: module.handlePageData || (() => void null),
 					handleError: module.handleError || (({ error }) => console.error(error)),
 					handleFetch: module.handleFetch || (({ request, fetch }) => fetch(request)),
 					reroute: module.reroute || (() => {})
@@ -80,7 +80,7 @@ export class Server {
 						handle: () => {
 							throw error;
 						},
-						handlePageData: ({ pageData, resolve }) => resolve(pageData),
+						handlePageData: () => void null,
 						handleError: ({ error }) => console.error(error),
 						handleFetch: ({ request, fetch }) => fetch(request),
 						reroute: () => {}

packages/kit/src/runtime/server/page/load_data.js

@@ -244,7 +244,7 @@ export function create_universal_fetch(event, state, fetched, csr, resolve_opts)
 			}
 		} else {
 			// simulate CORS errors and "no access to body in no-cors mode" server-side for consistency with client-side behaviour
-			const mode = input instanceof Request ? input.mode : init?.mode ?? 'cors';
+			const mode = input instanceof Request ? input.mode : (init?.mode ?? 'cors');
 			if (mode === 'no-cors') {
 				response = new Response('', {
 					status: response.status,

packages/kit/src/runtime/server/page/render.js

@@ -79,7 +79,7 @@ export async function render_response({
 
 	const form_value =
 		action_result?.type === 'success' || action_result?.type === 'failure'
-			? action_result.data ?? null
+			? (action_result.data ?? null)
 			: null;
 
 	/** @type {string} */